Oliver Kahn has warned Jens Lehmann he risks missing out on Germany's Euro2008 squad if he stays with Arsenal.
A move to Westphalia would have guaranteed him the regular playing time Germany coach Joachim Low is demanding from all his charges in the build-up to Euro 2008 in Austria and Switzerland.
Kahn, who lost his place in the Germany team to Lehmann for the 2006 World Cup, told the Bild newspaper: "In the past it would have been unimaginable that a national-team goalkeeper would be on the bench for his club.
"That is a problem, and Jens knows it as well. It is a dangerous situation."
Kahn added: "I am surprised that he (Lehmann) is not looking at every possibility to find first-team football."